Automatic Systems BL 229 - Terminology

3. TERMINOLOGY
AS Automatic Systems
CMD Control
DI Digital input
DO Digital output
I/O Input/Output
O/S Out of Service
HMI Human-Machine Interface
NC (Contact) Normally Closed (Closed in at-rest state (power off))
NO (Contact) Normally Open (Open in at-rest state (power off))
OP Opening
MVT Movement
RGBW Red – Green – Blue – White
ETF Electrical Technical File (File containing the electrical diagrams of the product and its most common options)
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BL 229